Amazon Linux 2027 Preview Security Advisory: ALAS2027-2026-093
Advisory Release Date: 2026-09-28 09:00 Pacific
Advisory Updated Date: 2026-09-28 09:00 Pacific
A NULL pointer dereference flaw was found in GStreamer's RTSP support library. The vulnerability occurs while parsing an Authorization or WWW-Authenticate header that uses Digest authentication. Specially crafted whitespace placement around a parameter's terminator can cause an internal length calculation to underflow, leading to a crash of the process parsing the header. On an RTSP server this can be triggered by a remote, unauthenticated attacker sending a single malformed request when the server has authentication enabled; the same flaw can also be triggered against an RTSP client by a malicious or compromised RTSP server. Successful exploitation results in a denial of service (application crash) and has no confirmed impact on confidentiality or integrity. (CVE-2026-85150)
Affected Packages:
gstreamer1-plugins-base
Issue Correction:
Run yum update gstreamer1-plugins-base to update your system.
aarch64:
gstreamer1-plugins-base-tools-debuginfo-1.28.6-1.amzn2027.0.1.aarch64
gstreamer1-plugins-base-tools-1.28.6-1.amzn2027.0.1.aarch64
gstreamer1-plugins-base-devel-1.28.6-1.amzn2027.0.1.aarch64
gstreamer1-plugins-base-debuginfo-1.28.6-1.amzn2027.0.1.aarch64
gstreamer1-plugins-base-1.28.6-1.amzn2027.0.1.aarch64
gstreamer1-plugins-base-debugsource-1.28.6-1.amzn2027.0.1.aarch64
src:
gstreamer1-plugins-base-1.28.6-1.amzn2027.0.1.src
x86_64:
gstreamer1-plugins-base-tools-debuginfo-1.28.6-1.amzn2027.0.1.x86_64
gstreamer1-plugins-base-tools-1.28.6-1.amzn2027.0.1.x86_64
gstreamer1-plugins-base-devel-1.28.6-1.amzn2027.0.1.x86_64
gstreamer1-plugins-base-debuginfo-1.28.6-1.amzn2027.0.1.x86_64
gstreamer1-plugins-base-debugsource-1.28.6-1.amzn2027.0.1.x86_64
gstreamer1-plugins-base-1.28.6-1.amzn2027.0.1.x86_64